Facebook has now suspended 400 apps as part of its post-Cambridge Analytica audit, including one from the University of Cambridge, which had 4 million users, Facebook's Ime Archibong says:

It’s clear that they shared information with researchers as well as companies with only limited protections in place. As a result we will notify the roughly 4 million people who chose to share their Facebook information with myPersonality that it may have been misused. Given we currently have no evidence that myPersonality accessed any friends’ information, we will not be notifying these people’s Facebook friends. Should that change, we will notify them.